Locomotive control



Oct.

x c., J. PILLIOD LOCOMOTIVE CONTROL Filed August '7, 1920 2 Sheets-Sheet1 1 ing a cylinder in which the 1 thereby preventing Patented Oct. 1926.

UMTEQ stares Parent orFicu.

CHARLES J. PILLIOD, OF TOLEDO, OHIO, ASSIGNOR T0 DANIEL SEARLES,TRUSTEE, OF

TOLEDO, OHIO,

LOCOMOTIVE oolvrnon Application filed August 7, 13-20. Serial No.401,881.

its primary object the provision of simple and eilicient means of thischaracter includfluid operating pressure. is balanced orequ'alized onopposite sides of the piston therein so that the piston is freed frombeing moved by the fluid pressure in any running or neutral position,

a possibility of the movement of the control meansl rom aset-runconstant travel valve gear ning or neutral position except bymanual manipulation of the control by the operator.

Further objects and advantages of the invention will be. apparent fromthe following detailed description thereof.

lVhile the invention, in its broader aspect, is ,capable of embodimentin numerous forms, an embodiment particularly for use in connection witha having a variable travel cut-oil sleeve, such for instance asdisclosed in my Patent No. 1,414,152, issued April 25, 1922, filedDecember 18, 1917 is illustrated in the accompanying drawings, inwhich,-

Figure 1 is a side elevation of a locomotive equipped with the inventionin connection with the engine cut-oil sleeves and reversing means. Fig.2 is an enlarged side elevation of the control means embodying theinvention and in connection with the reversing means operating cylinder.Fig. 3 is a fragmentary cross-section on the line 33 in Fig. 1. Fig. 1is an enlarged side elevation of the cut-off control means of the i Fig.5

controlled member of the cutoff valve. Fig. 10 is a similar view of theautomatically controlled member of the cutoff valve. Fig. 11 is a faceview of the stationary valve seat dotted lines.

thereof adapted more i 8 is a section on the line 8-8 in Fig. 7. Fig. 9is an outer face view of the manually for the automatic member of thecut-off valve. Fig. 12 is an enlarged 'outerface view of the manuallycontrolled member of the cut-oil valve in balanced or neutralizedrelation to the automatic member of such valve, the ports of thelatter.being shown in Fig. 13 is a chart diagram of the relativepositions of the. operating parts for the reverse valve andthe cut-offvalve, and Figs. 1 1, 15, 16, 17 and 18 are diagramniatical views of thecut-01f valve with the members thereof in diil'erent positions ofadjustment indicated in the diagram in Fig. 13. V

eater-ring to the drawings, 1 designates a locomotive equipped with across-head connected valve gear and with sleeve valve engines of thetype disclosed .in my said former application. In the valve gearillustrated, 2 designates thereverseyoke of the standard Marshal valvegear type, and this is connected by areach-rod 8 to a rockerarm 1 on theadjacent one of a pair of axially aligned tumbling shafts 5, 5,journaled crosswise of the locomotive and eachcarrying a rocker-arm 6 atits inner end. Sop

or construction of the control valvecomprising this inventionas any typeof motion reversing means maybe employed.

The adm'issionand exhaustot air or other suitable operating fluid to andfrom the reversing cylinder 9 is controlled through a valve 10, themovable valve member of which is under the control of theengineer in thecab of the locomotive. This valve comprises a valve. casing 11 forming afluid chamber 12 (Fig. 5) having on one side thereof a circular valveseat 13 with three fluid passages 1 1, 15 and 16 leading therefrom. Thepassages 14 and 15 have communication with opposite ends of the cylinder9 through pipes 17 and 18, respectively, so that they alternately act asadmission and exhaust passages for the reversing cylinder. The passage16 serves as the main exhaust port and is connected to first one andthen the other of the passages 14 and 15 through a segmental groove 19in the inner a face of a valve disk 20 that is mounted for rotarymovements in the fluid chamber 12 and rests against the valve seat 13.The

,valve disk 20 has ports 21 and 22 there-- through in adjacent spacedrelation to the re ends of the groove 19, and each port has a segmentalgroove 23 extending for a distance therefrom in opposition to theadjacent end of the groove 19, as illustrated by dotted lines in Fig. 7.When the valve disk 15 20 is at the extreme of its movement incounter-clockwise direction the port 21 will have moved downward pastthe passage 1% and the other end of the groove 23 for said port'will bein register with said passage, 20 thereby permitting live fluid to passfrom the chamber 12 throu 'h the port 21 and groove-'23 to the passage1d and thence through the pipe 17 to the respective end of the cylinder9 to force the piston 8 away 25 from such end 'ofthe cylinder. Theexhaust from the opposite end of the cylinder 7 9 will takeplace throughthe pipe 13, casing passage 15, valve groove 19 and exhaust passage 16,the groove 19 being then in position to open communication between thepassages-15 and 16', The admission and exhaust of fluid to and from thereversing cylinder 9 in this manner may take place throughout a range ofmovement of the valve disk 29 in either direction that is determinedbythe length of the groove 23. A reverse of this operation takes placewhen the valve diskis moved to place the port 22 or its groove 23 inregister with the casing passage 15, which is the position shown in Fig.7, and in which position the exhaust groove 19 in the valve disk openscommuni cation between the casing passage 14: and exhaust passage 16.Live fluid is admitted to the valve chamber 12 through a pipe 24. havingcommunication with any suitable source of supply. The valve disk 20 hasa stem 25 projecting axially therefrom without the casingrll (Fig. andthis stem carries a lever 26, theouter end of which is con-' '-nected bya reach-rod 27 to the engineers control lever 28 located in thelocomotive cab, orat any other suitable point of access.

The cut-01f control means, in its present embod ment, cornbrisesCylinder 29 having a piston'30 working therein, the piston rod of whichis connected without one end of the cylinder to across-head 31operating-in a A guide 32, and this crosshead is connected by a rod 33to the controlling levers 34. of the cut-off sleeves of the respectiveengine. Thecontrol valve for the cut-off cylinder comprises a valvecasing 35 fixed to the cylinder 29 and forming a fluid chamber 36 towhich live fluid, preferably but not necessarily air, is admittedthrough a pipe 37 from any suitable source of supply. The cyhnder sideof the chamber 36 is pro-' ,vided with a circular seat 38 against whichan automatically controlled valve disk 39 seats, and seating against theopposite or valve chamber side of this disk is a manually controlledvalve disk 40. The disk 39 is connected at its seat side to arocker-shaft el to rotate therewith, said shaft being ournaled in thebottom portion of the cylinder casing transversely thereof and carrying.an arm 4:2 at its outer end. This arm is connected by a link 13 to thelower short arm of a lever 44, which is fulcrum'ed to the cross-headguide 32 at one S ldGthG-YG? of, as at 1-5, and has its longer armconnected by a link 46 to amember 47 which fixedly rises from one sideof the cross-head 31 and moves with said crosshead. It is thus evidentthat movements of the crosshead 31 will impart predetermined rockingmovements to the valve disk 39.

The manually operated valve disk 40 has a stem 13 projecting axiallytherefrom through the valve casing 35 and provided at its outer end withan arm 49, connected by a link at), in the present instance, to thelower end of the lever 26, which operates the reversing valve, theconnection being such that the arm 49 will stand in the position shownin Fig. e whenthe lever 26 is in either of its two extreme positions ofthrow. it is therefore evident that the engineer has 'a unitary controlfor both the reversing valve and the cutoff valve and to accommodatesuch arrangement the reverslng valve is mounted on the casing of thecylinder 29,

in the present instance above the cut-ofi valve. It is apparent thatwhile I have shown the engineers control of the cut-oif valve as beingthrough the control or operating means of the reversing valve, the useof the cut-off valve is not limited to this arrangement as it may beused separately from the reversing valve and in such case placed indirect connection with the engineerscontro-l lever instead of throughthe operating means for the reversing valve, 'or the same control meansmay be used with the reversing valve eliminated therefrom.

The cut-off valve seat 38 (Fig. 11) is provided with three passages 51,52 and 53,

arranged in the present instance at substan tially 90 degrees apart,with the passages 51 and 52 in communication, with opposite ends of thecylinder 29 and with the passage 53 forming" a main exhaust and leadingto the atmosphere through a pipe 54.

The automatic valve disk 39 (Fig, 10) is provided with three ports 55,56 and 57 arranged to simultaneously register with the seat pasages51,52 and 53, respectlvely. A

segmental groove 58 is provided in the seat side ofthe valve disk 39 foreach port there- '56 in the valve member 39.

imparted to the .disk l0, ing the ports 55 and 56 in register. withthehead and valve levers is shown in and extends at :opposite sides of therespective. port in concentric relationvto the valve axis to permit thevalveportsttoremainfin constant "communication with .the respectlve'seatpassages 51, 52 and 53 durlng movement thereof 1 by between these portson its inner .itacewith a segmentalgroove G1, concentric to the valveaxis and terminating at its opposite ends adjacent to therespectiveports, as shown in Fig. '9. The ports 59 and 60 aresopositioned with respect to the ports 55aand 56 of the automatic valvemember39 that when the valve members are 1n thelr balanced position thelower edge portions o'ttheports 59 and 60 will overlap the upper-edgeportions of the ports 55 and 56. respectively, thereby connecting thefluid chamber 36 of the cut-off valve with bothends of the cylinder 29so that the pressureon both sides of the piston 30 is balanced orequalized. This overlapping of the. ports when the valve members are intheir balanced position is illustrated in Fig. 12. In this position-ofshort of communication with the respective ports 55,

i It is thus evident that a manual movement of thevalve the valves theends of theexhaust groove 61 i in the valve member stop just I member 40in clockwise direction will throw the port 60 into full opencommunication with the port 56, thereby admitting. full pressure offluid to the right end of the piston 30, and will move the port 59 outof register with the port and at the same time throw the exhaust groove61 into communication with the port 55 so that exhaust may take placefrom the left end of the cutoff cylinder, such exhaust passing to theatmosphere from the groove 61 through the port 57 in the valve 39 andthence through the casing passage 53 and pipe 54:. Itis evident that theadmission of fluid to one side and the-exhaust of fluid from the otherside of the piston 30 will cause a movement of the pistonin .thedirection ofiexhaust and thereby move the cross-head 31, which -in turncommunicates an automatic move ment of the valve disk 39 sullicienttocatch up with the manual movement whichwas thereby again placrespectiveports 59 and and cut off the exhaust so that the piston is balanced andautomatically lockedby fluid-pressure in the position to which moved, 1

The range of movement of both the crossdiagrammatically in Fig. 13 inwhich the extreme positions of the lever 26 are designated A and A,-theneutral position is designated 1C, and theintermediate positions aredesig nated B andB. In either position A, A otthe lever 26 the positionof the manually controlled rocker arm 49 of the cut-oil valve 35 will beA, while its position will be l3 for either position B, B. of the lever26, and will be C for the neutral position C of said lever. Theautomatic movement through the crosshead 31 of the valve member 39 is,also indicated in this diagram, the letters A on the members 42,43, 44,46 and l? designating the positions which said parts take when the lever26 is in either of its positions A, A. Likewise the positions B oi theseveral automatically moved members designate the positions of suchmembers when the lever 26 is in either of the positions 13, B of itsmovement, and the posiftions .C of the automatically moved membersdesignate the positions which they assurne when the lever 26 is initsneutral position C. a

The difi'ercnt positions of the members of the automatic valve 35 forthe different positions of movement of the lever 26 are illustrateddiagrammatically in Figs. 14 to 18 in which the outer casing designatesthe valve seat 38, the intermediate casing, the automatic valve member39 to which the arm 4-2 is connected, (and the inner casing the manuallycontrolled valve member 40 to which the arm 19 isconnected. hen thelever 26 is in the position A (Figs. 4: and 13) the valve parts willhave the relation shown in Fig. 14 in which relation thepassages 51 and52 leading to the ends of the cut-oil cylinder are both closed to theexhaustpassage 53 and the ports 59, 60 in the manually operated valvemember 40 are in the livefluid chamber 36 ot the valve and to close theright end of the cylinder to such chamber and open such end to theexhaust passage, as illustrated in Fig. 15, in which it will be notedthat the ports 59 and 55 and cylinder passage 51 are in register and thecylinder passage 52, port 56. exhaust groove 61. port 57 and passage arein register. This causesa movement of the piston 30 to the right untilthe automatic movement ot' the. valve member 39 by the cross-head 31 hasagain closed the exhaust passage and broughtltoth ports. 55 and 56 ofthe valve member 39 in registerwith the ports 59 and 60, as-illustrated'in Fig. 16, to equalize the .pressrireonboth sides of the piston 30 anda predetermined point of thereby lock it against'further movement.

Upon a further movement of the lever 26,

for instance, to C or neutral position,'the' ports 59 and 60 will againbe advanced to change the communicating relation of the ports 59 andwith the left" cylinder end and to close the connection between theports and 56 and open the right end of the cylinder to the exhaust, asillustrated in Fig. 17. The movement of the piston, which is occasionedby this change of position of the lever 26, imparts a further automaticmovement to the valve member 39 to again place its ports 55 and 56 inneutralizing relation to the ports 59 and 60 of the valve member 40 andto close the exhaust, as illustrated in 18. It is evident that upon afurther movement of. the lever 26, for instance, to

its 13 position and then to its A position, the movement of the manuallycontrolled valve'member 40 will be reversed from that above described sothat the valve parts will, upon successivemovementsof the lever, takethe positions illustrated successively in Figs.

17. 16, 15 and 14, or in other words, the operation of the valve partsduring the movement otthe lever from G to A positions is just thereverse to the operation of such parts during a movement of the leverfrom its A toC positions. V

M The reverse cylinder 9, being controlled by the valve 10, has itspiston moved from one end of the cylinder to the opposite end uponmanual movement of lever 26 from position A to A 13) the position C of asaid lever arranging the valve 10 so as to hold the piston in neutralposition.

It is evident'that I have provided a cutofl" control which issemi-automatic in its operation, in that upon a manual movement of thecontrol. the cut-off piston is moved to its stroke and thenautomatically arrested by equalizing the fluid pressure on oppositesides of the piston. This equalization of pressures does not permit acreeping of the cut-off piston in one direction or the other from itsneutral position by reason of fluid leakage, and therefore does notrequire the attention of the engineer to frequently adjust the controllever to compensate for leakage and the consequent creeping movement ofthe cut-off, an objection common with cut-offs heretofore employed, sofar as I am aware. It is also evident that while for convenience I have,in the present embodiment of the invention, shown the cut-off valve andthe reversing valve as operated by a'single operating means, either maybe, used separately from the other without departing from the scopeotthe invention, which resides primarily in the cut-ofl control.

I wish it understood that the invention is not limited to any specificconstruction, arrangement or form of theparts, as it is capable ofnumerousmodifications and changes valve for controlling the admissionand ex-.

haust of fluid to and from the reversing cylinder, a multiple partcut-0ft valve for controlling the admission and exhaust of fluid to andfrom the cut-ofl cylinder, .a 0011'.-

trol lever connected to the reversing valve for operating the same,separate'rocker arms connected to separate parts of the cuboif valve,connection between one of said arms and the control lever to cause themto have movements in unison, and a connection between the other of saidarms and the cut-oil piston to cause them to have movements in unisonwhereby a movement of the manually. controlled part of the cut-ofl valvewill open the exhaust at one end and the fluid admission at the otherend of the cut-off cylinder and the piston operated part of the cut-offvalve will then be automatically 'moved to open the fluid admission toboth ends of the cylind-erand close the exhaust when the piston hasmoved a predetermined extent. a

2. The combination-in a loc0motive,of a reversing cylinder and a pistontherein, a cut-off cylinder and a piston therein, a valve mounted on thecut-off cylinder and connected to the reversing cylinderforcontrolling'the admission and exhaust of fluid to and fromsaid reversingcylinder, a lever for operating said valve, a two-part valve forcontrolling the admission and exhaust of fluid to and from said cut-offcylinder,

means connecting one part of said cut-0E valve to said lever foreflecting movement of the first valve and said valve part in unison, andmeans for operating the companion valve part of said cut-off valve byand during movementof said cut-off piston'to bring said companion valvepart into normal relation with said first valve part after the latterhas been moved from such normal relation by the adjustment of said firstvalve, said valve parts when in their normal position equalizing thepressures-on the opposite sides of said cut-offpiston within said cutoffcylinder.

3. The combination in a locomotive, of a reversing cylinder and a pistonI therein, a

cut-ofl cylinder and a piston therein, a valve mounted on the cut-offcylinder and connected to the reversing cylinder for controlling theadmission and exhaust of fluid to and from said reversing cylinder, alever for operating said valve, .a two-part valve for controlling theadmission and exhaust of fluiclto anal from said cut-off cylindennleansand a connection between said rocker lever connecting one partof saidcut-01f valve to and the companion valve part for bringing 10 said leverfor effecting movement'cf the the same into pressureequalizing relationfirst valve and said valve part in u11is0n,'a with said first valvepart.

cross-headconn-ectedto thecut-ofl' pist'0n,a In testimonywhereof I havehereunto guide for the cross heaclegitencling from the signed my name tothis specification. cut-oil cylmcler, a rocker lever plvofecl on Y theguide and rockable by s-aid cross-head, CHARLES J. PILLlOD.

